PDF malware analysis — malicious · 75cfb5c3404de9ee

MALICIOUS

PDF

43.0 KB Created: 2020-10-25 21:03:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16

MD5: f4a683652dce9444e3b1b0a41de45c2d SHA-1: 8e4b274b28f4711855695f371bb1d25848f1e216 SHA-256: 75cfb5c3404de9ee661c6813c8262b005fdfffff76a1d48ef751ed0dcc0de4cb

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector link, indicating a phishing or malicious download attempt. The document body, though corrupted, contains text related to 'wav converter to mp3 apk download' and the malicious URL, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links suggests an attempt to drive traffic to potentially harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://gettraff.ru/123?keyword=wav+converter+to+mp3+apk+download In PDF document text
- https://cdn-cms.f-static.net/uploads/4366048/normal_5f875251587f8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413011/normal_5f94b4cf8d63f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370064/normal_5f8a3262d2e21.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4384035/normal_5f95a1856b03f.pdfIn PDF document text
- https://kivuligob.weebly.com/uploads/1/3/0/8/130874143/jepigupivewezi_mikurorefajexi_ruzesenazoxasa.pdfIn PDF document text
- https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/jabazotibo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381289/normal_5f94ac1e5c164.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366659/normal_5f8772e2730f6.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365636/normal_5f877fa0771e9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371025/normal_5f893eb6956c3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365555/normal_5f8759ca3b919.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/d2cae778-398d-4d27-bba0-f8f45cbff87b/86624224909.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4a4171d1-8ad4-47aa-b4ce-8d2f3559f01a/six_sassy_sentences.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/81c5278d-17d1-4c15-a859-865f925fd7dd/tobupawalopikifos.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ef627803-8355-4051-b83f-6aa5fbb99237/13153698758.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/29bc5017-f53c-413d-82ed-865bb32dc661/23725391830.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fc1b27b0-5d77-4fdd-b4ce-53c4242bbdae/jalosunugemasowijixenegiz.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e3b56b52-fc72-4205-8d41-4fd3786bdae6/manual_de_supervivencia_escolar_de_ned_doblaje.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d6c8683b-d7fc-4ca8-ab4b-1b534e435e01/jaxusiribelup.pdfIn PDF document text
- https://s3.amazonaws.com/nimuwet/2009_porsche_cayenne_s_owners_manual.pdfIn PDF document text
- https://s3.amazonaws.com/xanebavifamopez/biodata_format_in_marathi_download.pdfIn PDF document text
- https://s3.amazonaws.com/jovekus/88716574754.pdfIn PDF document text
- https://s3.amazonaws.com/kavitokolezub/midemopoxu.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000689b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x689B	5432 bytes
SHA-256: `32c95f7010bb97de85d323898e5ec300c26c27ffb3a033bee25f99e82fdba85c`
`font_01_sfnt_off00007b15.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7B15	10396 bytes
SHA-256: `52aca64d344c92bb8aaba991a1a6f22611fa474cec3fc39260a1099df6304f79`

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